---
product_id: 638087954
title: "Shimano Deore 9-Speed Mountain Bicycle Rear Derailleur - RD-M591"
brand: "shimano"
price: "9749CFA"
currency: XOF
in_stock: false
reviews_count: 8
url: https://www.desertcart.sn/products/638087954-shimano-deore-9-speed-mountain-bicycle-rear-derailleur-rd-m591
store_origin: SN
region: Senegal
---

# Direct mount for stability 9-speed precision shifting Max cassette capacity 34T Shimano Deore 9-Speed Mountain Bicycle Rear Derailleur - RD-M591

**Brand:** shimano
**Price:** 9749CFA
**Availability:** ❌ Out of Stock

## Summary

> ⚡ Shift like a pro, ride like a legend.

## Quick Answers

- **What is this?** Shimano Deore 9-Speed Mountain Bicycle Rear Derailleur - RD-M591 by shimano
- **How much does it cost?** 9749CFA with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.sn](https://www.desertcart.sn/products/638087954-shimano-deore-9-speed-mountain-bicycle-rear-derailleur-rd-m591)

## Best For

- shimano enthusiasts

## Why This Product

- Trusted shimano brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Chainstay Friendly:** Strong guide spring eliminates chainstay contact, reducing noise and wear.
- • **Effortless Shifting:** Light shift effort means less fatigue and more control on every ride.
- • **Rock-Solid Stability:** Direct mount design ensures your derailleur stays perfectly aligned, no matter the terrain.
- • **Optimized for RapidFire:** Perfectly tuned for Shimano RapidFire levers, delivering rapid, reliable gear changes.
- • **Seamless Gear Transitions:** Experience ultra-smooth, precise chain movement with Shimano’s Top-Normal shifting system.

## Overview

The Shimano Deore RD-M591 9-Speed Rear Derailleur offers precise, rapid gear changes with a direct mount design and a strong guide spring to maintain chain tension and reduce chainstay contact. Optimized for Shimano RapidFire levers, it supports up to a 34-tooth cassette, making it ideal for serious mountain biking performance.

## Description

The Shimano Deore M591 SGS Rear Derailleur features direct cable routing and a strong guide spring to maintain chain tension and eliminate chainstay contact. Top-Normal shifting system is optimized for use with Shimano RapidFire shift levers and provides precise and rapid performance with a light shift effort.

## Features

- Precise chain movement changes gears smoothly
- Direct Mount
- Light shift effort
- Maximum cassette capacity is 34T

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Number of Teeth | 34 |
| Product Dimensions | 6.5"L x 4.25"W x 3.75"H |
| Manufacturer | Cycle Force Group |
| UPC | 689228295469 |
| Global Trade Identification Number | 00689228295469 |
| Item Package Dimensions L x W x H | 7.28 x 4.13 x 3.62 inches |
| Package Weight | 0.4 Kilograms |
| Item Dimensions  LxWxH | 6.5 x 4.25 x 3.75 inches |
| Brand Name | SHIMANO |
| Suggested Users | unisex |
| Number of Items | 1 |
| Part Number | 144021 |
| Model Year | 2012 |
| Size | 9-Speed |
| Sport Type | Cycling |

## Product Details

- **Brand:** SHIMANO
- **Color:** Black
- **Item Weight:** 12.8 ounces
- **Case Material:** Alloy Steel
- **Mounting Type:** Direct Mount

## Images

![Shimano Deore 9-Speed Mountain Bicycle Rear Derailleur - RD-M591 - Image 1](https://m.media-amazon.com/images/I/613ndBy7JpL.jpg)
![Shimano Deore 9-Speed Mountain Bicycle Rear Derailleur - RD-M591 - Image 2](https://m.media-amazon.com/images/I/61-8v4q6k4L.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ It works
*by S***Y on December 1, 2021*

I'm on a budget and parts are getting scarce for the 9 speeds. I had a XTR before and loved it. Unfortunately, I sheared it and needed another which was not available. I bought this one and although the shifting isn't as crisp and it's not perfect (I ride a lot), it works. I'm a bit more careful with my shifts compared to before, but I'm not racing so it's been great. Great product, great seller and fast shipping.

### ⭐⭐⭐⭐⭐ Shimano Deore 9-Speed Rear Derailleur - RD-M591
*by R***. on September 3, 2022*

I have two of these Shimano Deore 9-speed derailleurs that I use with newer Shimano Sora and older Shimano Tiagra 9-speed brifters on touring bicycles. I also use Sram 9-speed chains and Sram 11-34 9 speed cassettes. Those combinations work great with smooth and accurate shifts. Both of the derailleurs have so far been very reliable.

### ⭐⭐⭐⭐⭐ Good product, good price, great experience!
*by B***W on June 8, 2014*

This was the first time I have changed out a Derailleur and I wanted it to be a definite upgrade. I went for the Prime and I was not disappointed. The installation was a piece of cake, the adjustment went precisely in step with the clear instructions, and my bike has been shifting flawlessly ever since.The cheapie OEM Derailleur that had worn out was a Shimano Altus, so the shifter did not present a problem and all I had to do was set the limit screws and the cable length. Since this was also a good opportunity to clean and lubricate the cable, I effectively, started over with a brand new system.The RD-M591 is a rugged, precision piece of equipment, unlike the sloppy, lightweight piece of garbage that it replaced. The amount of time I wasted trying to tweak the OEM Derailleur turned out to be a testimony to futility and absolute nonsense!My advice is this:If you are having trouble adjusting your Rear Derailleur, and you are following reasonable instructions, it's not you, it's your hardware. Spend a few bucks and replace it with the BLACK, all-metal RD-M591 (you don't need the gold-plated version) and then, you can lean back and just ride, ride, ride.

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**Shop now:** [https://www.desertcart.sn/products/638087954-shimano-deore-9-speed-mountain-bicycle-rear-derailleur-rd-m591](https://www.desertcart.sn/products/638087954-shimano-deore-9-speed-mountain-bicycle-rear-derailleur-rd-m591)

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*Product available on Desertcart Senegal*
*Store origin: SN*
*Last updated: 2026-03-03*